Diarylphenoxy aluminum compounds

The present invention relates diarylphenoxy aluminum compounds obtainable by reacting an alkyl aluminum compound and / or complex aluminum hydride bis (diarylphenol) ligand of the formula (I). The present invention also relates to isopulegol method of manufacturing by cyclizing citronellal in the presence of diarylphenoxy aluminum compound which acts as a use and a catalyst as catalysts diarylphenoxy aluminum compound. The present invention further in the presence of diarylphenoxy aluminum compound which acts as a catalyst cyclizing the citronellal to a process for the preparation of menthol due to subsequent hydrogenation.